マルチスレッドの例

class Info {
	public synchronized void hold() throws InterruptedException {
		this.wait();
	}
	public synchronized void run() {
		this.notifyAll();
	}
}

public class TestThread extends Thread {
	public int i = 0;
	public Info info;
	public int stop = 0;
	public int start = 0;

	public int getStop() {
		return stop;
	}

	public void setStop(int stop) {
		this.stop = stop;
	}

	public int getStart() {
		return start;
	}

	public void setStart(int start) {
		this.start = start;
	}

	public TestThread(Info info, int stop, int start) {
		this.stop = stop;
		this.start = start;
		this.info = info;
	}

	@Override
	public void run() {
		while (i < 20) {
			if (i == stop) {
				try {
					info.hold();
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
			}
			if(i==start){
				info.run();
			}
			i++;
			System.out.println(Thread.currentThread().getName()+":"+i);
			try {
				Thread.sleep(1000);
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}
	}
	public static void main(String[] args) {
		Info info = new Info();
		TestThread t1 = new TestThread(info, 8, -1);
		TestThread t2 = new TestThread(info,5,-1);
		TestThread t3 = new TestThread(info,-1,10);
		
		t1.setName("a");
		t2.setName("b");
		t3.setName("main");
		t3.start();
		t1.start();
		t1.setStop(5);
		t2.start();
	}
}